1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/time.h> 26 #include <linux/pm_qos_params.h> 27 #include <linux/uio.h> 28 #include <linux/dma-mapping.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/info.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/timer.h> 35 #include <sound/minors.h> 36 #include <asm/io.h> 37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 38 #include <dma-coherence.h> 39 #endif 40 41 /* 42 * Compatibility 43 */ 44 45 struct snd_pcm_hw_params_old { 46 unsigned int flags; 47 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 48 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 49 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 51 unsigned int rmask; 52 unsigned int cmask; 53 unsigned int info; 54 unsigned int msbits; 55 unsigned int rate_num; 56 unsigned int rate_den; 57 snd_pcm_uframes_t fifo_size; 58 unsigned char reserved[64]; 59 }; 60 61 #ifdef CONFIG_SND_SUPPORT_OLD_API 62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 64 65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params_old __user * _oparams); 67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params_old __user * _oparams); 69 #endif 70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 71 72 /* 73 * 74 */ 75 76 DEFINE_RWLOCK(snd_pcm_link_rwlock); 77 EXPORT_SYMBOL(snd_pcm_link_rwlock); 78 79 static DECLARE_RWSEM(snd_pcm_link_rwsem); 80 81 static inline mm_segment_t snd_enter_user(void) 82 { 83 mm_segment_t fs = get_fs(); 84 set_fs(get_ds()); 85 return fs; 86 } 87 88 static inline void snd_leave_user(mm_segment_t fs) 89 { 90 set_fs(fs); 91 } 92 93 94 95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 96 { 97 struct snd_pcm_runtime *runtime; 98 struct snd_pcm *pcm = substream->pcm; 99 struct snd_pcm_str *pstr = substream->pstr; 100 101 memset(info, 0, sizeof(*info)); 102 info->card = pcm->card->number; 103 info->device = pcm->device; 104 info->stream = substream->stream; 105 info->subdevice = substream->number; 106 strlcpy(info->id, pcm->id, sizeof(info->id)); 107 strlcpy(info->name, pcm->name, sizeof(info->name)); 108 info->dev_class = pcm->dev_class; 109 info->dev_subclass = pcm->dev_subclass; 110 info->subdevices_count = pstr->substream_count; 111 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 112 strlcpy(info->subname, substream->name, sizeof(info->subname)); 113 runtime = substream->runtime; 114 /* AB: FIXME!!! This is definitely nonsense */ 115 if (runtime) { 116 info->sync = runtime->sync; 117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 118 } 119 return 0; 120 } 121 122 int snd_pcm_info_user(struct snd_pcm_substream *substream, 123 struct snd_pcm_info __user * _info) 124 { 125 struct snd_pcm_info *info; 126 int err; 127 128 info = kmalloc(sizeof(*info), GFP_KERNEL); 129 if (! info) 130 return -ENOMEM; 131 err = snd_pcm_info(substream, info); 132 if (err >= 0) { 133 if (copy_to_user(_info, info, sizeof(*info))) 134 err = -EFAULT; 135 } 136 kfree(info); 137 return err; 138 } 139 140 #undef RULES_DEBUG 141 142 #ifdef RULES_DEBUG 143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 144 static const char * const snd_pcm_hw_param_names[] = { 145 HW_PARAM(ACCESS), 146 HW_PARAM(FORMAT), 147 HW_PARAM(SUBFORMAT), 148 HW_PARAM(SAMPLE_BITS), 149 HW_PARAM(FRAME_BITS), 150 HW_PARAM(CHANNELS), 151 HW_PARAM(RATE), 152 HW_PARAM(PERIOD_TIME), 153 HW_PARAM(PERIOD_SIZE), 154 HW_PARAM(PERIOD_BYTES), 155 HW_PARAM(PERIODS), 156 HW_PARAM(BUFFER_TIME), 157 HW_PARAM(BUFFER_SIZE), 158 HW_PARAM(BUFFER_BYTES), 159 HW_PARAM(TICK_TIME), 160 }; 161 #endif 162 163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 164 struct snd_pcm_hw_params *params) 165 { 166 unsigned int k; 167 struct snd_pcm_hardware *hw; 168 struct snd_interval *i = NULL; 169 struct snd_mask *m = NULL; 170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 171 unsigned int rstamps[constrs->rules_num]; 172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 173 unsigned int stamp = 2; 174 int changed, again; 175 176 params->info = 0; 177 params->fifo_size = 0; 178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 179 params->msbits = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 181 params->rate_num = 0; 182 params->rate_den = 0; 183 } 184 185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 186 m = hw_param_mask(params, k); 187 if (snd_mask_empty(m)) 188 return -EINVAL; 189 if (!(params->rmask & (1 << k))) 190 continue; 191 #ifdef RULES_DEBUG 192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 194 #endif 195 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 196 #ifdef RULES_DEBUG 197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 198 #endif 199 if (changed) 200 params->cmask |= 1 << k; 201 if (changed < 0) 202 return changed; 203 } 204 205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 206 i = hw_param_interval(params, k); 207 if (snd_interval_empty(i)) 208 return -EINVAL; 209 if (!(params->rmask & (1 << k))) 210 continue; 211 #ifdef RULES_DEBUG 212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 213 if (i->empty) 214 printk("empty"); 215 else 216 printk("%c%u %u%c", 217 i->openmin ? '(' : '[', i->min, 218 i->max, i->openmax ? ')' : ']'); 219 printk(" -> "); 220 #endif 221 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 222 #ifdef RULES_DEBUG 223 if (i->empty) 224 printk("empty\n"); 225 else 226 printk("%c%u %u%c\n", 227 i->openmin ? '(' : '[', i->min, 228 i->max, i->openmax ? ')' : ']'); 229 #endif 230 if (changed) 231 params->cmask |= 1 << k; 232 if (changed < 0) 233 return changed; 234 } 235 236 for (k = 0; k < constrs->rules_num; k++) 237 rstamps[k] = 0; 238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 240 do { 241 again = 0; 242 for (k = 0; k < constrs->rules_num; k++) { 243 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 244 unsigned int d; 245 int doit = 0; 246 if (r->cond && !(r->cond & params->flags)) 247 continue; 248 for (d = 0; r->deps[d] >= 0; d++) { 249 if (vstamps[r->deps[d]] > rstamps[k]) { 250 doit = 1; 251 break; 252 } 253 } 254 if (!doit) 255 continue; 256 #ifdef RULES_DEBUG 257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 258 if (r->var >= 0) { 259 printk("%s = ", snd_pcm_hw_param_names[r->var]); 260 if (hw_is_mask(r->var)) { 261 m = hw_param_mask(params, r->var); 262 printk("%x", *m->bits); 263 } else { 264 i = hw_param_interval(params, r->var); 265 if (i->empty) 266 printk("empty"); 267 else 268 printk("%c%u %u%c", 269 i->openmin ? '(' : '[', i->min, 270 i->max, i->openmax ? ')' : ']'); 271 } 272 } 273 #endif 274 changed = r->func(params, r); 275 #ifdef RULES_DEBUG 276 if (r->var >= 0) { 277 printk(" -> "); 278 if (hw_is_mask(r->var)) 279 printk("%x", *m->bits); 280 else { 281 if (i->empty) 282 printk("empty"); 283 else 284 printk("%c%u %u%c", 285 i->openmin ? '(' : '[', i->min, 286 i->max, i->openmax ? ')' : ']'); 287 } 288 } 289 printk("\n"); 290 #endif 291 rstamps[k] = stamp; 292 if (changed && r->var >= 0) { 293 params->cmask |= (1 << r->var); 294 vstamps[r->var] = stamp; 295 again = 1; 296 } 297 if (changed < 0) 298 return changed; 299 stamp++; 300 } 301 } while (again); 302 if (!params->msbits) { 303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 304 if (snd_interval_single(i)) 305 params->msbits = snd_interval_value(i); 306 } 307 308 if (!params->rate_den) { 309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 310 if (snd_interval_single(i)) { 311 params->rate_num = snd_interval_value(i); 312 params->rate_den = 1; 313 } 314 } 315 316 hw = &substream->runtime->hw; 317 if (!params->info) 318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 319 if (!params->fifo_size) { 320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 322 if (snd_mask_min(m) == snd_mask_max(m) && 323 snd_interval_min(i) == snd_interval_max(i)) { 324 changed = substream->ops->ioctl(substream, 325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 326 if (changed < 0) 327 return changed; 328 } 329 } 330 params->rmask = 0; 331 return 0; 332 } 333 334 EXPORT_SYMBOL(snd_pcm_hw_refine); 335 336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 337 struct snd_pcm_hw_params __user * _params) 338 { 339 struct snd_pcm_hw_params *params; 340 int err; 341 342 params = memdup_user(_params, sizeof(*params)); 343 if (IS_ERR(params)) 344 return PTR_ERR(params); 345 346 err = snd_pcm_hw_refine(substream, params); 347 if (copy_to_user(_params, params, sizeof(*params))) { 348 if (!err) 349 err = -EFAULT; 350 } 351 352 kfree(params); 353 return err; 354 } 355 356 static int period_to_usecs(struct snd_pcm_runtime *runtime) 357 { 358 int usecs; 359 360 if (! runtime->rate) 361 return -1; /* invalid */ 362 363 /* take 75% of period time as the deadline */ 364 usecs = (750000 / runtime->rate) * runtime->period_size; 365 usecs += ((750000 % runtime->rate) * runtime->period_size) / 366 runtime->rate; 367 368 return usecs; 369 } 370 371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 372 struct snd_pcm_hw_params *params) 373 { 374 struct snd_pcm_runtime *runtime; 375 int err, usecs; 376 unsigned int bits; 377 snd_pcm_uframes_t frames; 378 379 if (PCM_RUNTIME_CHECK(substream)) 380 return -ENXIO; 381 runtime = substream->runtime; 382 snd_pcm_stream_lock_irq(substream); 383 switch (runtime->status->state) { 384 case SNDRV_PCM_STATE_OPEN: 385 case SNDRV_PCM_STATE_SETUP: 386 case SNDRV_PCM_STATE_PREPARED: 387 break; 388 default: 389 snd_pcm_stream_unlock_irq(substream); 390 return -EBADFD; 391 } 392 snd_pcm_stream_unlock_irq(substream); 393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 394 if (!substream->oss.oss) 395 #endif 396 if (atomic_read(&substream->mmap_count)) 397 return -EBADFD; 398 399 params->rmask = ~0U; 400 err = snd_pcm_hw_refine(substream, params); 401 if (err < 0) 402 goto _error; 403 404 err = snd_pcm_hw_params_choose(substream, params); 405 if (err < 0) 406 goto _error; 407 408 if (substream->ops->hw_params != NULL) { 409 err = substream->ops->hw_params(substream, params); 410 if (err < 0) 411 goto _error; 412 } 413 414 runtime->access = params_access(params); 415 runtime->format = params_format(params); 416 runtime->subformat = params_subformat(params); 417 runtime->channels = params_channels(params); 418 runtime->rate = params_rate(params); 419 runtime->period_size = params_period_size(params); 420 runtime->periods = params_periods(params); 421 runtime->buffer_size = params_buffer_size(params); 422 runtime->info = params->info; 423 runtime->rate_num = params->rate_num; 424 runtime->rate_den = params->rate_den; 425 426 bits = snd_pcm_format_physical_width(runtime->format); 427 runtime->sample_bits = bits; 428 bits *= runtime->channels; 429 runtime->frame_bits = bits; 430 frames = 1; 431 while (bits % 8 != 0) { 432 bits *= 2; 433 frames *= 2; 434 } 435 runtime->byte_align = bits / 8; 436 runtime->min_align = frames; 437 438 /* Default sw params */ 439 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 440 runtime->period_step = 1; 441 runtime->control->avail_min = runtime->period_size; 442 runtime->start_threshold = 1; 443 runtime->stop_threshold = runtime->buffer_size; 444 runtime->silence_threshold = 0; 445 runtime->silence_size = 0; 446 runtime->boundary = runtime->buffer_size; 447 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 448 runtime->boundary *= 2; 449 450 snd_pcm_timer_resolution_change(substream); 451 runtime->status->state = SNDRV_PCM_STATE_SETUP; 452 453 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 454 pm_qos_remove_request(&substream->latency_pm_qos_req); 455 if ((usecs = period_to_usecs(runtime)) >= 0) 456 pm_qos_add_request(&substream->latency_pm_qos_req, 457 PM_QOS_CPU_DMA_LATENCY, usecs); 458 return 0; 459 _error: 460 /* hardware might be unuseable from this time, 461 so we force application to retry to set 462 the correct hardware parameter settings */ 463 runtime->status->state = SNDRV_PCM_STATE_OPEN; 464 if (substream->ops->hw_free != NULL) 465 substream->ops->hw_free(substream); 466 return err; 467 } 468 469 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 470 struct snd_pcm_hw_params __user * _params) 471 { 472 struct snd_pcm_hw_params *params; 473 int err; 474 475 params = memdup_user(_params, sizeof(*params)); 476 if (IS_ERR(params)) 477 return PTR_ERR(params); 478 479 err = snd_pcm_hw_params(substream, params); 480 if (copy_to_user(_params, params, sizeof(*params))) { 481 if (!err) 482 err = -EFAULT; 483 } 484 485 kfree(params); 486 return err; 487 } 488 489 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 490 { 491 struct snd_pcm_runtime *runtime; 492 int result = 0; 493 494 if (PCM_RUNTIME_CHECK(substream)) 495 return -ENXIO; 496 runtime = substream->runtime; 497 snd_pcm_stream_lock_irq(substream); 498 switch (runtime->status->state) { 499 case SNDRV_PCM_STATE_SETUP: 500 case SNDRV_PCM_STATE_PREPARED: 501 break; 502 default: 503 snd_pcm_stream_unlock_irq(substream); 504 return -EBADFD; 505 } 506 snd_pcm_stream_unlock_irq(substream); 507 if (atomic_read(&substream->mmap_count)) 508 return -EBADFD; 509 if (substream->ops->hw_free) 510 result = substream->ops->hw_free(substream); 511 runtime->status->state = SNDRV_PCM_STATE_OPEN; 512 pm_qos_remove_request(&substream->latency_pm_qos_req); 513 return result; 514 } 515 516 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 517 struct snd_pcm_sw_params *params) 518 { 519 struct snd_pcm_runtime *runtime; 520 int err; 521 522 if (PCM_RUNTIME_CHECK(substream)) 523 return -ENXIO; 524 runtime = substream->runtime; 525 snd_pcm_stream_lock_irq(substream); 526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 527 snd_pcm_stream_unlock_irq(substream); 528 return -EBADFD; 529 } 530 snd_pcm_stream_unlock_irq(substream); 531 532 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 533 return -EINVAL; 534 if (params->avail_min == 0) 535 return -EINVAL; 536 if (params->silence_size >= runtime->boundary) { 537 if (params->silence_threshold != 0) 538 return -EINVAL; 539 } else { 540 if (params->silence_size > params->silence_threshold) 541 return -EINVAL; 542 if (params->silence_threshold > runtime->buffer_size) 543 return -EINVAL; 544 } 545 err = 0; 546 snd_pcm_stream_lock_irq(substream); 547 runtime->tstamp_mode = params->tstamp_mode; 548 runtime->period_step = params->period_step; 549 runtime->control->avail_min = params->avail_min; 550 runtime->start_threshold = params->start_threshold; 551 runtime->stop_threshold = params->stop_threshold; 552 runtime->silence_threshold = params->silence_threshold; 553 runtime->silence_size = params->silence_size; 554 params->boundary = runtime->boundary; 555 if (snd_pcm_running(substream)) { 556 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 557 runtime->silence_size > 0) 558 snd_pcm_playback_silence(substream, ULONG_MAX); 559 err = snd_pcm_update_state(substream, runtime); 560 } 561 snd_pcm_stream_unlock_irq(substream); 562 return err; 563 } 564 565 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 566 struct snd_pcm_sw_params __user * _params) 567 { 568 struct snd_pcm_sw_params params; 569 int err; 570 if (copy_from_user(¶ms, _params, sizeof(params))) 571 return -EFAULT; 572 err = snd_pcm_sw_params(substream, ¶ms); 573 if (copy_to_user(_params, ¶ms, sizeof(params))) 574 return -EFAULT; 575 return err; 576 } 577 578 int snd_pcm_status(struct snd_pcm_substream *substream, 579 struct snd_pcm_status *status) 580 { 581 struct snd_pcm_runtime *runtime = substream->runtime; 582 583 snd_pcm_stream_lock_irq(substream); 584 status->state = runtime->status->state; 585 status->suspended_state = runtime->status->suspended_state; 586 if (status->state == SNDRV_PCM_STATE_OPEN) 587 goto _end; 588 status->trigger_tstamp = runtime->trigger_tstamp; 589 if (snd_pcm_running(substream)) { 590 snd_pcm_update_hw_ptr(substream); 591 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 592 status->tstamp = runtime->status->tstamp; 593 goto _tstamp_end; 594 } 595 } 596 snd_pcm_gettime(runtime, &status->tstamp); 597 _tstamp_end: 598 status->appl_ptr = runtime->control->appl_ptr; 599 status->hw_ptr = runtime->status->hw_ptr; 600 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 601 status->avail = snd_pcm_playback_avail(runtime); 602 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 603 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 604 status->delay = runtime->buffer_size - status->avail; 605 status->delay += runtime->delay; 606 } else 607 status->delay = 0; 608 } else { 609 status->avail = snd_pcm_capture_avail(runtime); 610 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 611 status->delay = status->avail + runtime->delay; 612 else 613 status->delay = 0; 614 } 615 status->avail_max = runtime->avail_max; 616 status->overrange = runtime->overrange; 617 runtime->avail_max = 0; 618 runtime->overrange = 0; 619 _end: 620 snd_pcm_stream_unlock_irq(substream); 621 return 0; 622 } 623 624 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 625 struct snd_pcm_status __user * _status) 626 { 627 struct snd_pcm_status status; 628 int res; 629 630 memset(&status, 0, sizeof(status)); 631 res = snd_pcm_status(substream, &status); 632 if (res < 0) 633 return res; 634 if (copy_to_user(_status, &status, sizeof(status))) 635 return -EFAULT; 636 return 0; 637 } 638 639 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 640 struct snd_pcm_channel_info * info) 641 { 642 struct snd_pcm_runtime *runtime; 643 unsigned int channel; 644 645 channel = info->channel; 646 runtime = substream->runtime; 647 snd_pcm_stream_lock_irq(substream); 648 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 649 snd_pcm_stream_unlock_irq(substream); 650 return -EBADFD; 651 } 652 snd_pcm_stream_unlock_irq(substream); 653 if (channel >= runtime->channels) 654 return -EINVAL; 655 memset(info, 0, sizeof(*info)); 656 info->channel = channel; 657 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 658 } 659 660 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 661 struct snd_pcm_channel_info __user * _info) 662 { 663 struct snd_pcm_channel_info info; 664 int res; 665 666 if (copy_from_user(&info, _info, sizeof(info))) 667 return -EFAULT; 668 res = snd_pcm_channel_info(substream, &info); 669 if (res < 0) 670 return res; 671 if (copy_to_user(_info, &info, sizeof(info))) 672 return -EFAULT; 673 return 0; 674 } 675 676 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 677 { 678 struct snd_pcm_runtime *runtime = substream->runtime; 679 if (runtime->trigger_master == NULL) 680 return; 681 if (runtime->trigger_master == substream) { 682 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 683 } else { 684 snd_pcm_trigger_tstamp(runtime->trigger_master); 685 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 686 } 687 runtime->trigger_master = NULL; 688 } 689 690 struct action_ops { 691 int (*pre_action)(struct snd_pcm_substream *substream, int state); 692 int (*do_action)(struct snd_pcm_substream *substream, int state); 693 void (*undo_action)(struct snd_pcm_substream *substream, int state); 694 void (*post_action)(struct snd_pcm_substream *substream, int state); 695 }; 696 697 /* 698 * this functions is core for handling of linked stream 699 * Note: the stream state might be changed also on failure 700 * Note2: call with calling stream lock + link lock 701 */ 702 static int snd_pcm_action_group(struct action_ops *ops, 703 struct snd_pcm_substream *substream, 704 int state, int do_lock) 705 { 706 struct snd_pcm_substream *s = NULL; 707 struct snd_pcm_substream *s1; 708 int res = 0; 709 710 snd_pcm_group_for_each_entry(s, substream) { 711 if (do_lock && s != substream) 712 spin_lock_nested(&s->self_group.lock, 713 SINGLE_DEPTH_NESTING); 714 res = ops->pre_action(s, state); 715 if (res < 0) 716 goto _unlock; 717 } 718 snd_pcm_group_for_each_entry(s, substream) { 719 res = ops->do_action(s, state); 720 if (res < 0) { 721 if (ops->undo_action) { 722 snd_pcm_group_for_each_entry(s1, substream) { 723 if (s1 == s) /* failed stream */ 724 break; 725 ops->undo_action(s1, state); 726 } 727 } 728 s = NULL; /* unlock all */ 729 goto _unlock; 730 } 731 } 732 snd_pcm_group_for_each_entry(s, substream) { 733 ops->post_action(s, state); 734 } 735 _unlock: 736 if (do_lock) { 737 /* unlock streams */ 738 snd_pcm_group_for_each_entry(s1, substream) { 739 if (s1 != substream) 740 spin_unlock(&s1->self_group.lock); 741 if (s1 == s) /* end */ 742 break; 743 } 744 } 745 return res; 746 } 747 748 /* 749 * Note: call with stream lock 750 */ 751 static int snd_pcm_action_single(struct action_ops *ops, 752 struct snd_pcm_substream *substream, 753 int state) 754 { 755 int res; 756 757 res = ops->pre_action(substream, state); 758 if (res < 0) 759 return res; 760 res = ops->do_action(substream, state); 761 if (res == 0) 762 ops->post_action(substream, state); 763 else if (ops->undo_action) 764 ops->undo_action(substream, state); 765 return res; 766 } 767 768 /* 769 * Note: call with stream lock 770 */ 771 static int snd_pcm_action(struct action_ops *ops, 772 struct snd_pcm_substream *substream, 773 int state) 774 { 775 int res; 776 777 if (snd_pcm_stream_linked(substream)) { 778 if (!spin_trylock(&substream->group->lock)) { 779 spin_unlock(&substream->self_group.lock); 780 spin_lock(&substream->group->lock); 781 spin_lock(&substream->self_group.lock); 782 } 783 res = snd_pcm_action_group(ops, substream, state, 1); 784 spin_unlock(&substream->group->lock); 785 } else { 786 res = snd_pcm_action_single(ops, substream, state); 787 } 788 return res; 789 } 790 791 /* 792 * Note: don't use any locks before 793 */ 794 static int snd_pcm_action_lock_irq(struct action_ops *ops, 795 struct snd_pcm_substream *substream, 796 int state) 797 { 798 int res; 799 800 read_lock_irq(&snd_pcm_link_rwlock); 801 if (snd_pcm_stream_linked(substream)) { 802 spin_lock(&substream->group->lock); 803 spin_lock(&substream->self_group.lock); 804 res = snd_pcm_action_group(ops, substream, state, 1); 805 spin_unlock(&substream->self_group.lock); 806 spin_unlock(&substream->group->lock); 807 } else { 808 spin_lock(&substream->self_group.lock); 809 res = snd_pcm_action_single(ops, substream, state); 810 spin_unlock(&substream->self_group.lock); 811 } 812 read_unlock_irq(&snd_pcm_link_rwlock); 813 return res; 814 } 815 816 /* 817 */ 818 static int snd_pcm_action_nonatomic(struct action_ops *ops, 819 struct snd_pcm_substream *substream, 820 int state) 821 { 822 int res; 823 824 down_read(&snd_pcm_link_rwsem); 825 if (snd_pcm_stream_linked(substream)) 826 res = snd_pcm_action_group(ops, substream, state, 0); 827 else 828 res = snd_pcm_action_single(ops, substream, state); 829 up_read(&snd_pcm_link_rwsem); 830 return res; 831 } 832 833 /* 834 * start callbacks 835 */ 836 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 837 { 838 struct snd_pcm_runtime *runtime = substream->runtime; 839 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 840 return -EBADFD; 841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 842 !snd_pcm_playback_data(substream)) 843 return -EPIPE; 844 runtime->trigger_master = substream; 845 return 0; 846 } 847 848 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 849 { 850 if (substream->runtime->trigger_master != substream) 851 return 0; 852 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 853 } 854 855 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 856 { 857 if (substream->runtime->trigger_master == substream) 858 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 859 } 860 861 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 862 { 863 struct snd_pcm_runtime *runtime = substream->runtime; 864 snd_pcm_trigger_tstamp(substream); 865 runtime->hw_ptr_jiffies = jiffies; 866 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 867 runtime->rate; 868 runtime->status->state = state; 869 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 870 runtime->silence_size > 0) 871 snd_pcm_playback_silence(substream, ULONG_MAX); 872 if (substream->timer) 873 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 874 &runtime->trigger_tstamp); 875 } 876 877 static struct action_ops snd_pcm_action_start = { 878 .pre_action = snd_pcm_pre_start, 879 .do_action = snd_pcm_do_start, 880 .undo_action = snd_pcm_undo_start, 881 .post_action = snd_pcm_post_start 882 }; 883 884 /** 885 * snd_pcm_start - start all linked streams 886 * @substream: the PCM substream instance 887 */ 888 int snd_pcm_start(struct snd_pcm_substream *substream) 889 { 890 return snd_pcm_action(&snd_pcm_action_start, substream, 891 SNDRV_PCM_STATE_RUNNING); 892 } 893 894 /* 895 * stop callbacks 896 */ 897 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 898 { 899 struct snd_pcm_runtime *runtime = substream->runtime; 900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 901 return -EBADFD; 902 runtime->trigger_master = substream; 903 return 0; 904 } 905 906 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 907 { 908 if (substream->runtime->trigger_master == substream && 909 snd_pcm_running(substream)) 910 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 911 return 0; /* unconditonally stop all substreams */ 912 } 913 914 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 915 { 916 struct snd_pcm_runtime *runtime = substream->runtime; 917 if (runtime->status->state != state) { 918 snd_pcm_trigger_tstamp(substream); 919 if (substream->timer) 920 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 921 &runtime->trigger_tstamp); 922 runtime->status->state = state; 923 } 924 wake_up(&runtime->sleep); 925 wake_up(&runtime->tsleep); 926 } 927 928 static struct action_ops snd_pcm_action_stop = { 929 .pre_action = snd_pcm_pre_stop, 930 .do_action = snd_pcm_do_stop, 931 .post_action = snd_pcm_post_stop 932 }; 933 934 /** 935 * snd_pcm_stop - try to stop all running streams in the substream group 936 * @substream: the PCM substream instance 937 * @state: PCM state after stopping the stream 938 * 939 * The state of each stream is then changed to the given state unconditionally. 940 */ 941 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 942 { 943 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 944 } 945 946 EXPORT_SYMBOL(snd_pcm_stop); 947 948 /** 949 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 950 * @substream: the PCM substream 951 * 952 * After stopping, the state is changed to SETUP. 953 * Unlike snd_pcm_stop(), this affects only the given stream. 954 */ 955 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 956 { 957 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 958 SNDRV_PCM_STATE_SETUP); 959 } 960 961 /* 962 * pause callbacks 963 */ 964 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 965 { 966 struct snd_pcm_runtime *runtime = substream->runtime; 967 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 968 return -ENOSYS; 969 if (push) { 970 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 971 return -EBADFD; 972 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 973 return -EBADFD; 974 runtime->trigger_master = substream; 975 return 0; 976 } 977 978 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 979 { 980 if (substream->runtime->trigger_master != substream) 981 return 0; 982 /* some drivers might use hw_ptr to recover from the pause - 983 update the hw_ptr now */ 984 if (push) 985 snd_pcm_update_hw_ptr(substream); 986 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 987 * a delta betwen the current jiffies, this gives a large enough 988 * delta, effectively to skip the check once. 989 */ 990 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 991 return substream->ops->trigger(substream, 992 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 993 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 994 } 995 996 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 997 { 998 if (substream->runtime->trigger_master == substream) 999 substream->ops->trigger(substream, 1000 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1001 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1002 } 1003 1004 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1005 { 1006 struct snd_pcm_runtime *runtime = substream->runtime; 1007 snd_pcm_trigger_tstamp(substream); 1008 if (push) { 1009 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1010 if (substream->timer) 1011 snd_timer_notify(substream->timer, 1012 SNDRV_TIMER_EVENT_MPAUSE, 1013 &runtime->trigger_tstamp); 1014 wake_up(&runtime->sleep); 1015 wake_up(&runtime->tsleep); 1016 } else { 1017 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1018 if (substream->timer) 1019 snd_timer_notify(substream->timer, 1020 SNDRV_TIMER_EVENT_MCONTINUE, 1021 &runtime->trigger_tstamp); 1022 } 1023 } 1024 1025 static struct action_ops snd_pcm_action_pause = { 1026 .pre_action = snd_pcm_pre_pause, 1027 .do_action = snd_pcm_do_pause, 1028 .undo_action = snd_pcm_undo_pause, 1029 .post_action = snd_pcm_post_pause 1030 }; 1031 1032 /* 1033 * Push/release the pause for all linked streams. 1034 */ 1035 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1036 { 1037 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1038 } 1039 1040 #ifdef CONFIG_PM 1041 /* suspend */ 1042 1043 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1044 { 1045 struct snd_pcm_runtime *runtime = substream->runtime; 1046 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1047 return -EBUSY; 1048 runtime->trigger_master = substream; 1049 return 0; 1050 } 1051 1052 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1053 { 1054 struct snd_pcm_runtime *runtime = substream->runtime; 1055 if (runtime->trigger_master != substream) 1056 return 0; 1057 if (! snd_pcm_running(substream)) 1058 return 0; 1059 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1060 return 0; /* suspend unconditionally */ 1061 } 1062 1063 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1064 { 1065 struct snd_pcm_runtime *runtime = substream->runtime; 1066 snd_pcm_trigger_tstamp(substream); 1067 if (substream->timer) 1068 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1069 &runtime->trigger_tstamp); 1070 runtime->status->suspended_state = runtime->status->state; 1071 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1072 wake_up(&runtime->sleep); 1073 wake_up(&runtime->tsleep); 1074 } 1075 1076 static struct action_ops snd_pcm_action_suspend = { 1077 .pre_action = snd_pcm_pre_suspend, 1078 .do_action = snd_pcm_do_suspend, 1079 .post_action = snd_pcm_post_suspend 1080 }; 1081 1082 /** 1083 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1084 * @substream: the PCM substream 1085 * 1086 * After this call, all streams are changed to SUSPENDED state. 1087 */ 1088 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1089 { 1090 int err; 1091 unsigned long flags; 1092 1093 if (! substream) 1094 return 0; 1095 1096 snd_pcm_stream_lock_irqsave(substream, flags); 1097 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1098 snd_pcm_stream_unlock_irqrestore(substream, flags); 1099 return err; 1100 } 1101 1102 EXPORT_SYMBOL(snd_pcm_suspend); 1103 1104 /** 1105 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1106 * @pcm: the PCM instance 1107 * 1108 * After this call, all streams are changed to SUSPENDED state. 1109 */ 1110 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1111 { 1112 struct snd_pcm_substream *substream; 1113 int stream, err = 0; 1114 1115 if (! pcm) 1116 return 0; 1117 1118 for (stream = 0; stream < 2; stream++) { 1119 for (substream = pcm->streams[stream].substream; 1120 substream; substream = substream->next) { 1121 /* FIXME: the open/close code should lock this as well */ 1122 if (substream->runtime == NULL) 1123 continue; 1124 err = snd_pcm_suspend(substream); 1125 if (err < 0 && err != -EBUSY) 1126 return err; 1127 } 1128 } 1129 return 0; 1130 } 1131 1132 EXPORT_SYMBOL(snd_pcm_suspend_all); 1133 1134 /* resume */ 1135 1136 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1137 { 1138 struct snd_pcm_runtime *runtime = substream->runtime; 1139 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1140 return -ENOSYS; 1141 runtime->trigger_master = substream; 1142 return 0; 1143 } 1144 1145 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1146 { 1147 struct snd_pcm_runtime *runtime = substream->runtime; 1148 if (runtime->trigger_master != substream) 1149 return 0; 1150 /* DMA not running previously? */ 1151 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1152 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1153 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1154 return 0; 1155 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1156 } 1157 1158 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1159 { 1160 if (substream->runtime->trigger_master == substream && 1161 snd_pcm_running(substream)) 1162 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1163 } 1164 1165 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1166 { 1167 struct snd_pcm_runtime *runtime = substream->runtime; 1168 snd_pcm_trigger_tstamp(substream); 1169 if (substream->timer) 1170 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1171 &runtime->trigger_tstamp); 1172 runtime->status->state = runtime->status->suspended_state; 1173 } 1174 1175 static struct action_ops snd_pcm_action_resume = { 1176 .pre_action = snd_pcm_pre_resume, 1177 .do_action = snd_pcm_do_resume, 1178 .undo_action = snd_pcm_undo_resume, 1179 .post_action = snd_pcm_post_resume 1180 }; 1181 1182 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1183 { 1184 struct snd_card *card = substream->pcm->card; 1185 int res; 1186 1187 snd_power_lock(card); 1188 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1189 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1190 snd_power_unlock(card); 1191 return res; 1192 } 1193 1194 #else 1195 1196 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1197 { 1198 return -ENOSYS; 1199 } 1200 1201 #endif /* CONFIG_PM */ 1202 1203 /* 1204 * xrun ioctl 1205 * 1206 * Change the RUNNING stream(s) to XRUN state. 1207 */ 1208 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1209 { 1210 struct snd_card *card = substream->pcm->card; 1211 struct snd_pcm_runtime *runtime = substream->runtime; 1212 int result; 1213 1214 snd_power_lock(card); 1215 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1216 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1217 if (result < 0) 1218 goto _unlock; 1219 } 1220 1221 snd_pcm_stream_lock_irq(substream); 1222 switch (runtime->status->state) { 1223 case SNDRV_PCM_STATE_XRUN: 1224 result = 0; /* already there */ 1225 break; 1226 case SNDRV_PCM_STATE_RUNNING: 1227 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1228 break; 1229 default: 1230 result = -EBADFD; 1231 } 1232 snd_pcm_stream_unlock_irq(substream); 1233 _unlock: 1234 snd_power_unlock(card); 1235 return result; 1236 } 1237 1238 /* 1239 * reset ioctl 1240 */ 1241 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1242 { 1243 struct snd_pcm_runtime *runtime = substream->runtime; 1244 switch (runtime->status->state) { 1245 case SNDRV_PCM_STATE_RUNNING: 1246 case SNDRV_PCM_STATE_PREPARED: 1247 case SNDRV_PCM_STATE_PAUSED: 1248 case SNDRV_PCM_STATE_SUSPENDED: 1249 return 0; 1250 default: 1251 return -EBADFD; 1252 } 1253 } 1254 1255 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1256 { 1257 struct snd_pcm_runtime *runtime = substream->runtime; 1258 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1259 if (err < 0) 1260 return err; 1261 runtime->hw_ptr_base = 0; 1262 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1263 runtime->status->hw_ptr % runtime->period_size; 1264 runtime->silence_start = runtime->status->hw_ptr; 1265 runtime->silence_filled = 0; 1266 return 0; 1267 } 1268 1269 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1270 { 1271 struct snd_pcm_runtime *runtime = substream->runtime; 1272 runtime->control->appl_ptr = runtime->status->hw_ptr; 1273 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1274 runtime->silence_size > 0) 1275 snd_pcm_playback_silence(substream, ULONG_MAX); 1276 } 1277 1278 static struct action_ops snd_pcm_action_reset = { 1279 .pre_action = snd_pcm_pre_reset, 1280 .do_action = snd_pcm_do_reset, 1281 .post_action = snd_pcm_post_reset 1282 }; 1283 1284 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1285 { 1286 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1287 } 1288 1289 /* 1290 * prepare ioctl 1291 */ 1292 /* we use the second argument for updating f_flags */ 1293 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1294 int f_flags) 1295 { 1296 struct snd_pcm_runtime *runtime = substream->runtime; 1297 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1298 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1299 return -EBADFD; 1300 if (snd_pcm_running(substream)) 1301 return -EBUSY; 1302 substream->f_flags = f_flags; 1303 return 0; 1304 } 1305 1306 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1307 { 1308 int err; 1309 err = substream->ops->prepare(substream); 1310 if (err < 0) 1311 return err; 1312 return snd_pcm_do_reset(substream, 0); 1313 } 1314 1315 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1316 { 1317 struct snd_pcm_runtime *runtime = substream->runtime; 1318 runtime->control->appl_ptr = runtime->status->hw_ptr; 1319 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1320 } 1321 1322 static struct action_ops snd_pcm_action_prepare = { 1323 .pre_action = snd_pcm_pre_prepare, 1324 .do_action = snd_pcm_do_prepare, 1325 .post_action = snd_pcm_post_prepare 1326 }; 1327 1328 /** 1329 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1330 * @substream: the PCM substream instance 1331 * @file: file to refer f_flags 1332 */ 1333 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1334 struct file *file) 1335 { 1336 int res; 1337 struct snd_card *card = substream->pcm->card; 1338 int f_flags; 1339 1340 if (file) 1341 f_flags = file->f_flags; 1342 else 1343 f_flags = substream->f_flags; 1344 1345 snd_power_lock(card); 1346 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1347 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1348 substream, f_flags); 1349 snd_power_unlock(card); 1350 return res; 1351 } 1352 1353 /* 1354 * drain ioctl 1355 */ 1356 1357 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1358 { 1359 substream->runtime->trigger_master = substream; 1360 return 0; 1361 } 1362 1363 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1364 { 1365 struct snd_pcm_runtime *runtime = substream->runtime; 1366 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1367 switch (runtime->status->state) { 1368 case SNDRV_PCM_STATE_PREPARED: 1369 /* start playback stream if possible */ 1370 if (! snd_pcm_playback_empty(substream)) { 1371 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1372 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1373 } 1374 break; 1375 case SNDRV_PCM_STATE_RUNNING: 1376 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1377 break; 1378 default: 1379 break; 1380 } 1381 } else { 1382 /* stop running stream */ 1383 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1384 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1385 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1386 snd_pcm_do_stop(substream, new_state); 1387 snd_pcm_post_stop(substream, new_state); 1388 } 1389 } 1390 return 0; 1391 } 1392 1393 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1394 { 1395 } 1396 1397 static struct action_ops snd_pcm_action_drain_init = { 1398 .pre_action = snd_pcm_pre_drain_init, 1399 .do_action = snd_pcm_do_drain_init, 1400 .post_action = snd_pcm_post_drain_init 1401 }; 1402 1403 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1404 1405 /* 1406 * Drain the stream(s). 1407 * When the substream is linked, sync until the draining of all playback streams 1408 * is finished. 1409 * After this call, all streams are supposed to be either SETUP or DRAINING 1410 * (capture only) state. 1411 */ 1412 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1413 struct file *file) 1414 { 1415 struct snd_card *card; 1416 struct snd_pcm_runtime *runtime; 1417 struct snd_pcm_substream *s; 1418 wait_queue_t wait; 1419 int result = 0; 1420 int nonblock = 0; 1421 1422 card = substream->pcm->card; 1423 runtime = substream->runtime; 1424 1425 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1426 return -EBADFD; 1427 1428 snd_power_lock(card); 1429 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1430 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1431 if (result < 0) { 1432 snd_power_unlock(card); 1433 return result; 1434 } 1435 } 1436 1437 if (file) { 1438 if (file->f_flags & O_NONBLOCK) 1439 nonblock = 1; 1440 } else if (substream->f_flags & O_NONBLOCK) 1441 nonblock = 1; 1442 1443 down_read(&snd_pcm_link_rwsem); 1444 snd_pcm_stream_lock_irq(substream); 1445 /* resume pause */ 1446 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1447 snd_pcm_pause(substream, 0); 1448 1449 /* pre-start/stop - all running streams are changed to DRAINING state */ 1450 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1451 if (result < 0) 1452 goto unlock; 1453 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1454 if (nonblock) { 1455 result = -EAGAIN; 1456 goto unlock; 1457 } 1458 1459 for (;;) { 1460 long tout; 1461 struct snd_pcm_runtime *to_check; 1462 if (signal_pending(current)) { 1463 result = -ERESTARTSYS; 1464 break; 1465 } 1466 /* find a substream to drain */ 1467 to_check = NULL; 1468 snd_pcm_group_for_each_entry(s, substream) { 1469 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1470 continue; 1471 runtime = s->runtime; 1472 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1473 to_check = runtime; 1474 break; 1475 } 1476 } 1477 if (!to_check) 1478 break; /* all drained */ 1479 init_waitqueue_entry(&wait, current); 1480 add_wait_queue(&to_check->sleep, &wait); 1481 set_current_state(TASK_INTERRUPTIBLE); 1482 snd_pcm_stream_unlock_irq(substream); 1483 up_read(&snd_pcm_link_rwsem); 1484 snd_power_unlock(card); 1485 tout = schedule_timeout(10 * HZ); 1486 snd_power_lock(card); 1487 down_read(&snd_pcm_link_rwsem); 1488 snd_pcm_stream_lock_irq(substream); 1489 remove_wait_queue(&to_check->sleep, &wait); 1490 if (tout == 0) { 1491 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1492 result = -ESTRPIPE; 1493 else { 1494 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1495 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1496 result = -EIO; 1497 } 1498 break; 1499 } 1500 } 1501 1502 unlock: 1503 snd_pcm_stream_unlock_irq(substream); 1504 up_read(&snd_pcm_link_rwsem); 1505 snd_power_unlock(card); 1506 1507 return result; 1508 } 1509 1510 /* 1511 * drop ioctl 1512 * 1513 * Immediately put all linked substreams into SETUP state. 1514 */ 1515 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1516 { 1517 struct snd_pcm_runtime *runtime; 1518 struct snd_card *card; 1519 int result = 0; 1520 1521 if (PCM_RUNTIME_CHECK(substream)) 1522 return -ENXIO; 1523 runtime = substream->runtime; 1524 card = substream->pcm->card; 1525 1526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1527 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1528 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1529 return -EBADFD; 1530 1531 snd_pcm_stream_lock_irq(substream); 1532 /* resume pause */ 1533 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1534 snd_pcm_pause(substream, 0); 1535 1536 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1537 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1538 snd_pcm_stream_unlock_irq(substream); 1539 1540 return result; 1541 } 1542 1543 1544 /* WARNING: Don't forget to fput back the file */ 1545 static struct file *snd_pcm_file_fd(int fd) 1546 { 1547 struct file *file; 1548 struct inode *inode; 1549 unsigned int minor; 1550 1551 file = fget(fd); 1552 if (!file) 1553 return NULL; 1554 inode = file->f_path.dentry->d_inode; 1555 if (!S_ISCHR(inode->i_mode) || 1556 imajor(inode) != snd_major) { 1557 fput(file); 1558 return NULL; 1559 } 1560 minor = iminor(inode); 1561 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1562 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1563 fput(file); 1564 return NULL; 1565 } 1566 return file; 1567 } 1568 1569 /* 1570 * PCM link handling 1571 */ 1572 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1573 { 1574 int res = 0; 1575 struct file *file; 1576 struct snd_pcm_file *pcm_file; 1577 struct snd_pcm_substream *substream1; 1578 1579 file = snd_pcm_file_fd(fd); 1580 if (!file) 1581 return -EBADFD; 1582 pcm_file = file->private_data; 1583 substream1 = pcm_file->substream; 1584 down_write(&snd_pcm_link_rwsem); 1585 write_lock_irq(&snd_pcm_link_rwlock); 1586 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1587 substream->runtime->status->state != substream1->runtime->status->state) { 1588 res = -EBADFD; 1589 goto _end; 1590 } 1591 if (snd_pcm_stream_linked(substream1)) { 1592 res = -EALREADY; 1593 goto _end; 1594 } 1595 if (!snd_pcm_stream_linked(substream)) { 1596 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1597 if (substream->group == NULL) { 1598 res = -ENOMEM; 1599 goto _end; 1600 } 1601 spin_lock_init(&substream->group->lock); 1602 INIT_LIST_HEAD(&substream->group->substreams); 1603 list_add_tail(&substream->link_list, &substream->group->substreams); 1604 substream->group->count = 1; 1605 } 1606 list_add_tail(&substream1->link_list, &substream->group->substreams); 1607 substream->group->count++; 1608 substream1->group = substream->group; 1609 _end: 1610 write_unlock_irq(&snd_pcm_link_rwlock); 1611 up_write(&snd_pcm_link_rwsem); 1612 fput(file); 1613 return res; 1614 } 1615 1616 static void relink_to_local(struct snd_pcm_substream *substream) 1617 { 1618 substream->group = &substream->self_group; 1619 INIT_LIST_HEAD(&substream->self_group.substreams); 1620 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1621 } 1622 1623 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1624 { 1625 struct snd_pcm_substream *s; 1626 int res = 0; 1627 1628 down_write(&snd_pcm_link_rwsem); 1629 write_lock_irq(&snd_pcm_link_rwlock); 1630 if (!snd_pcm_stream_linked(substream)) { 1631 res = -EALREADY; 1632 goto _end; 1633 } 1634 list_del(&substream->link_list); 1635 substream->group->count--; 1636 if (substream->group->count == 1) { /* detach the last stream, too */ 1637 snd_pcm_group_for_each_entry(s, substream) { 1638 relink_to_local(s); 1639 break; 1640 } 1641 kfree(substream->group); 1642 } 1643 relink_to_local(substream); 1644 _end: 1645 write_unlock_irq(&snd_pcm_link_rwlock); 1646 up_write(&snd_pcm_link_rwsem); 1647 return res; 1648 } 1649 1650 /* 1651 * hw configurator 1652 */ 1653 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1654 struct snd_pcm_hw_rule *rule) 1655 { 1656 struct snd_interval t; 1657 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1658 hw_param_interval_c(params, rule->deps[1]), &t); 1659 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1660 } 1661 1662 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1663 struct snd_pcm_hw_rule *rule) 1664 { 1665 struct snd_interval t; 1666 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1667 hw_param_interval_c(params, rule->deps[1]), &t); 1668 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1669 } 1670 1671 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1672 struct snd_pcm_hw_rule *rule) 1673 { 1674 struct snd_interval t; 1675 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1676 hw_param_interval_c(params, rule->deps[1]), 1677 (unsigned long) rule->private, &t); 1678 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1679 } 1680 1681 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1682 struct snd_pcm_hw_rule *rule) 1683 { 1684 struct snd_interval t; 1685 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1686 (unsigned long) rule->private, 1687 hw_param_interval_c(params, rule->deps[1]), &t); 1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1689 } 1690 1691 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1692 struct snd_pcm_hw_rule *rule) 1693 { 1694 unsigned int k; 1695 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1696 struct snd_mask m; 1697 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1698 snd_mask_any(&m); 1699 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1700 int bits; 1701 if (! snd_mask_test(mask, k)) 1702 continue; 1703 bits = snd_pcm_format_physical_width(k); 1704 if (bits <= 0) 1705 continue; /* ignore invalid formats */ 1706 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1707 snd_mask_reset(&m, k); 1708 } 1709 return snd_mask_refine(mask, &m); 1710 } 1711 1712 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1713 struct snd_pcm_hw_rule *rule) 1714 { 1715 struct snd_interval t; 1716 unsigned int k; 1717 t.min = UINT_MAX; 1718 t.max = 0; 1719 t.openmin = 0; 1720 t.openmax = 0; 1721 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1722 int bits; 1723 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1724 continue; 1725 bits = snd_pcm_format_physical_width(k); 1726 if (bits <= 0) 1727 continue; /* ignore invalid formats */ 1728 if (t.min > (unsigned)bits) 1729 t.min = bits; 1730 if (t.max < (unsigned)bits) 1731 t.max = bits; 1732 } 1733 t.integer = 1; 1734 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1735 } 1736 1737 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1738 #error "Change this table" 1739 #endif 1740 1741 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1742 48000, 64000, 88200, 96000, 176400, 192000 }; 1743 1744 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1745 .count = ARRAY_SIZE(rates), 1746 .list = rates, 1747 }; 1748 1749 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1750 struct snd_pcm_hw_rule *rule) 1751 { 1752 struct snd_pcm_hardware *hw = rule->private; 1753 return snd_interval_list(hw_param_interval(params, rule->var), 1754 snd_pcm_known_rates.count, 1755 snd_pcm_known_rates.list, hw->rates); 1756 } 1757 1758 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1759 struct snd_pcm_hw_rule *rule) 1760 { 1761 struct snd_interval t; 1762 struct snd_pcm_substream *substream = rule->private; 1763 t.min = 0; 1764 t.max = substream->buffer_bytes_max; 1765 t.openmin = 0; 1766 t.openmax = 0; 1767 t.integer = 1; 1768 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1769 } 1770 1771 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1772 { 1773 struct snd_pcm_runtime *runtime = substream->runtime; 1774 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1775 int k, err; 1776 1777 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1778 snd_mask_any(constrs_mask(constrs, k)); 1779 } 1780 1781 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1782 snd_interval_any(constrs_interval(constrs, k)); 1783 } 1784 1785 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1786 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1787 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1788 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1789 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1790 1791 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1792 snd_pcm_hw_rule_format, NULL, 1793 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1794 if (err < 0) 1795 return err; 1796 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1797 snd_pcm_hw_rule_sample_bits, NULL, 1798 SNDRV_PCM_HW_PARAM_FORMAT, 1799 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1800 if (err < 0) 1801 return err; 1802 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1803 snd_pcm_hw_rule_div, NULL, 1804 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1805 if (err < 0) 1806 return err; 1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1808 snd_pcm_hw_rule_mul, NULL, 1809 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1810 if (err < 0) 1811 return err; 1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1813 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1814 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1815 if (err < 0) 1816 return err; 1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1818 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1819 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1820 if (err < 0) 1821 return err; 1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1823 snd_pcm_hw_rule_div, NULL, 1824 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1828 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1829 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1830 if (err < 0) 1831 return err; 1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1833 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1834 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1835 if (err < 0) 1836 return err; 1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1838 snd_pcm_hw_rule_div, NULL, 1839 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1840 if (err < 0) 1841 return err; 1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1843 snd_pcm_hw_rule_div, NULL, 1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1845 if (err < 0) 1846 return err; 1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1848 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1849 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1850 if (err < 0) 1851 return err; 1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1853 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1854 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1855 if (err < 0) 1856 return err; 1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1858 snd_pcm_hw_rule_mul, NULL, 1859 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1860 if (err < 0) 1861 return err; 1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1863 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1864 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1865 if (err < 0) 1866 return err; 1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1868 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1869 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1870 if (err < 0) 1871 return err; 1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1873 snd_pcm_hw_rule_muldivk, (void*) 8, 1874 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1875 if (err < 0) 1876 return err; 1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1878 snd_pcm_hw_rule_muldivk, (void*) 8, 1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1880 if (err < 0) 1881 return err; 1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1883 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1885 if (err < 0) 1886 return err; 1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1888 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1890 if (err < 0) 1891 return err; 1892 return 0; 1893 } 1894 1895 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1896 { 1897 struct snd_pcm_runtime *runtime = substream->runtime; 1898 struct snd_pcm_hardware *hw = &runtime->hw; 1899 int err; 1900 unsigned int mask = 0; 1901 1902 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1903 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1904 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1905 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1906 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1907 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1908 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1909 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1910 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1911 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1912 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1913 } 1914 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1915 if (err < 0) 1916 return err; 1917 1918 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1919 if (err < 0) 1920 return err; 1921 1922 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1923 if (err < 0) 1924 return err; 1925 1926 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1927 hw->channels_min, hw->channels_max); 1928 if (err < 0) 1929 return err; 1930 1931 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1932 hw->rate_min, hw->rate_max); 1933 if (err < 0) 1934 return err; 1935 1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1937 hw->period_bytes_min, hw->period_bytes_max); 1938 if (err < 0) 1939 return err; 1940 1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1942 hw->periods_min, hw->periods_max); 1943 if (err < 0) 1944 return err; 1945 1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1947 hw->period_bytes_min, hw->buffer_bytes_max); 1948 if (err < 0) 1949 return err; 1950 1951 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1952 snd_pcm_hw_rule_buffer_bytes_max, substream, 1953 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1954 if (err < 0) 1955 return err; 1956 1957 /* FIXME: remove */ 1958 if (runtime->dma_bytes) { 1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1960 if (err < 0) 1961 return -EINVAL; 1962 } 1963 1964 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1965 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1966 snd_pcm_hw_rule_rate, hw, 1967 SNDRV_PCM_HW_PARAM_RATE, -1); 1968 if (err < 0) 1969 return err; 1970 } 1971 1972 /* FIXME: this belong to lowlevel */ 1973 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1974 1975 return 0; 1976 } 1977 1978 static void pcm_release_private(struct snd_pcm_substream *substream) 1979 { 1980 snd_pcm_unlink(substream); 1981 } 1982 1983 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1984 { 1985 substream->ref_count--; 1986 if (substream->ref_count > 0) 1987 return; 1988 1989 snd_pcm_drop(substream); 1990 if (substream->hw_opened) { 1991 if (substream->ops->hw_free != NULL) 1992 substream->ops->hw_free(substream); 1993 substream->ops->close(substream); 1994 substream->hw_opened = 0; 1995 } 1996 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 1997 pm_qos_remove_request(&substream->latency_pm_qos_req); 1998 if (substream->pcm_release) { 1999 substream->pcm_release(substream); 2000 substream->pcm_release = NULL; 2001 } 2002 snd_pcm_detach_substream(substream); 2003 } 2004 2005 EXPORT_SYMBOL(snd_pcm_release_substream); 2006 2007 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2008 struct file *file, 2009 struct snd_pcm_substream **rsubstream) 2010 { 2011 struct snd_pcm_substream *substream; 2012 int err; 2013 2014 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2015 if (err < 0) 2016 return err; 2017 if (substream->ref_count > 1) { 2018 *rsubstream = substream; 2019 return 0; 2020 } 2021 2022 err = snd_pcm_hw_constraints_init(substream); 2023 if (err < 0) { 2024 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2025 goto error; 2026 } 2027 2028 if ((err = substream->ops->open(substream)) < 0) 2029 goto error; 2030 2031 substream->hw_opened = 1; 2032 2033 err = snd_pcm_hw_constraints_complete(substream); 2034 if (err < 0) { 2035 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2036 goto error; 2037 } 2038 2039 *rsubstream = substream; 2040 return 0; 2041 2042 error: 2043 snd_pcm_release_substream(substream); 2044 return err; 2045 } 2046 2047 EXPORT_SYMBOL(snd_pcm_open_substream); 2048 2049 static int snd_pcm_open_file(struct file *file, 2050 struct snd_pcm *pcm, 2051 int stream, 2052 struct snd_pcm_file **rpcm_file) 2053 { 2054 struct snd_pcm_file *pcm_file; 2055 struct snd_pcm_substream *substream; 2056 struct snd_pcm_str *str; 2057 int err; 2058 2059 if (rpcm_file) 2060 *rpcm_file = NULL; 2061 2062 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2063 if (err < 0) 2064 return err; 2065 2066 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2067 if (pcm_file == NULL) { 2068 snd_pcm_release_substream(substream); 2069 return -ENOMEM; 2070 } 2071 pcm_file->substream = substream; 2072 if (substream->ref_count == 1) { 2073 str = substream->pstr; 2074 substream->file = pcm_file; 2075 substream->pcm_release = pcm_release_private; 2076 } 2077 file->private_data = pcm_file; 2078 if (rpcm_file) 2079 *rpcm_file = pcm_file; 2080 return 0; 2081 } 2082 2083 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2084 { 2085 struct snd_pcm *pcm; 2086 int err = nonseekable_open(inode, file); 2087 if (err < 0) 2088 return err; 2089 pcm = snd_lookup_minor_data(iminor(inode), 2090 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2091 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2092 } 2093 2094 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2095 { 2096 struct snd_pcm *pcm; 2097 int err = nonseekable_open(inode, file); 2098 if (err < 0) 2099 return err; 2100 pcm = snd_lookup_minor_data(iminor(inode), 2101 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2102 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2103 } 2104 2105 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2106 { 2107 int err; 2108 struct snd_pcm_file *pcm_file; 2109 wait_queue_t wait; 2110 2111 if (pcm == NULL) { 2112 err = -ENODEV; 2113 goto __error1; 2114 } 2115 err = snd_card_file_add(pcm->card, file); 2116 if (err < 0) 2117 goto __error1; 2118 if (!try_module_get(pcm->card->module)) { 2119 err = -EFAULT; 2120 goto __error2; 2121 } 2122 init_waitqueue_entry(&wait, current); 2123 add_wait_queue(&pcm->open_wait, &wait); 2124 mutex_lock(&pcm->open_mutex); 2125 while (1) { 2126 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2127 if (err >= 0) 2128 break; 2129 if (err == -EAGAIN) { 2130 if (file->f_flags & O_NONBLOCK) { 2131 err = -EBUSY; 2132 break; 2133 } 2134 } else 2135 break; 2136 set_current_state(TASK_INTERRUPTIBLE); 2137 mutex_unlock(&pcm->open_mutex); 2138 schedule(); 2139 mutex_lock(&pcm->open_mutex); 2140 if (signal_pending(current)) { 2141 err = -ERESTARTSYS; 2142 break; 2143 } 2144 } 2145 remove_wait_queue(&pcm->open_wait, &wait); 2146 mutex_unlock(&pcm->open_mutex); 2147 if (err < 0) 2148 goto __error; 2149 return err; 2150 2151 __error: 2152 module_put(pcm->card->module); 2153 __error2: 2154 snd_card_file_remove(pcm->card, file); 2155 __error1: 2156 return err; 2157 } 2158 2159 static int snd_pcm_release(struct inode *inode, struct file *file) 2160 { 2161 struct snd_pcm *pcm; 2162 struct snd_pcm_substream *substream; 2163 struct snd_pcm_file *pcm_file; 2164 2165 pcm_file = file->private_data; 2166 substream = pcm_file->substream; 2167 if (snd_BUG_ON(!substream)) 2168 return -ENXIO; 2169 pcm = substream->pcm; 2170 mutex_lock(&pcm->open_mutex); 2171 snd_pcm_release_substream(substream); 2172 kfree(pcm_file); 2173 mutex_unlock(&pcm->open_mutex); 2174 wake_up(&pcm->open_wait); 2175 module_put(pcm->card->module); 2176 snd_card_file_remove(pcm->card, file); 2177 return 0; 2178 } 2179 2180 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2181 snd_pcm_uframes_t frames) 2182 { 2183 struct snd_pcm_runtime *runtime = substream->runtime; 2184 snd_pcm_sframes_t appl_ptr; 2185 snd_pcm_sframes_t ret; 2186 snd_pcm_sframes_t hw_avail; 2187 2188 if (frames == 0) 2189 return 0; 2190 2191 snd_pcm_stream_lock_irq(substream); 2192 switch (runtime->status->state) { 2193 case SNDRV_PCM_STATE_PREPARED: 2194 break; 2195 case SNDRV_PCM_STATE_DRAINING: 2196 case SNDRV_PCM_STATE_RUNNING: 2197 if (snd_pcm_update_hw_ptr(substream) >= 0) 2198 break; 2199 /* Fall through */ 2200 case SNDRV_PCM_STATE_XRUN: 2201 ret = -EPIPE; 2202 goto __end; 2203 case SNDRV_PCM_STATE_SUSPENDED: 2204 ret = -ESTRPIPE; 2205 goto __end; 2206 default: 2207 ret = -EBADFD; 2208 goto __end; 2209 } 2210 2211 hw_avail = snd_pcm_playback_hw_avail(runtime); 2212 if (hw_avail <= 0) { 2213 ret = 0; 2214 goto __end; 2215 } 2216 if (frames > (snd_pcm_uframes_t)hw_avail) 2217 frames = hw_avail; 2218 appl_ptr = runtime->control->appl_ptr - frames; 2219 if (appl_ptr < 0) 2220 appl_ptr += runtime->boundary; 2221 runtime->control->appl_ptr = appl_ptr; 2222 ret = frames; 2223 __end: 2224 snd_pcm_stream_unlock_irq(substream); 2225 return ret; 2226 } 2227 2228 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2229 snd_pcm_uframes_t frames) 2230 { 2231 struct snd_pcm_runtime *runtime = substream->runtime; 2232 snd_pcm_sframes_t appl_ptr; 2233 snd_pcm_sframes_t ret; 2234 snd_pcm_sframes_t hw_avail; 2235 2236 if (frames == 0) 2237 return 0; 2238 2239 snd_pcm_stream_lock_irq(substream); 2240 switch (runtime->status->state) { 2241 case SNDRV_PCM_STATE_PREPARED: 2242 case SNDRV_PCM_STATE_DRAINING: 2243 break; 2244 case SNDRV_PCM_STATE_RUNNING: 2245 if (snd_pcm_update_hw_ptr(substream) >= 0) 2246 break; 2247 /* Fall through */ 2248 case SNDRV_PCM_STATE_XRUN: 2249 ret = -EPIPE; 2250 goto __end; 2251 case SNDRV_PCM_STATE_SUSPENDED: 2252 ret = -ESTRPIPE; 2253 goto __end; 2254 default: 2255 ret = -EBADFD; 2256 goto __end; 2257 } 2258 2259 hw_avail = snd_pcm_capture_hw_avail(runtime); 2260 if (hw_avail <= 0) { 2261 ret = 0; 2262 goto __end; 2263 } 2264 if (frames > (snd_pcm_uframes_t)hw_avail) 2265 frames = hw_avail; 2266 appl_ptr = runtime->control->appl_ptr - frames; 2267 if (appl_ptr < 0) 2268 appl_ptr += runtime->boundary; 2269 runtime->control->appl_ptr = appl_ptr; 2270 ret = frames; 2271 __end: 2272 snd_pcm_stream_unlock_irq(substream); 2273 return ret; 2274 } 2275 2276 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2277 snd_pcm_uframes_t frames) 2278 { 2279 struct snd_pcm_runtime *runtime = substream->runtime; 2280 snd_pcm_sframes_t appl_ptr; 2281 snd_pcm_sframes_t ret; 2282 snd_pcm_sframes_t avail; 2283 2284 if (frames == 0) 2285 return 0; 2286 2287 snd_pcm_stream_lock_irq(substream); 2288 switch (runtime->status->state) { 2289 case SNDRV_PCM_STATE_PREPARED: 2290 case SNDRV_PCM_STATE_PAUSED: 2291 break; 2292 case SNDRV_PCM_STATE_DRAINING: 2293 case SNDRV_PCM_STATE_RUNNING: 2294 if (snd_pcm_update_hw_ptr(substream) >= 0) 2295 break; 2296 /* Fall through */ 2297 case SNDRV_PCM_STATE_XRUN: 2298 ret = -EPIPE; 2299 goto __end; 2300 case SNDRV_PCM_STATE_SUSPENDED: 2301 ret = -ESTRPIPE; 2302 goto __end; 2303 default: 2304 ret = -EBADFD; 2305 goto __end; 2306 } 2307 2308 avail = snd_pcm_playback_avail(runtime); 2309 if (avail <= 0) { 2310 ret = 0; 2311 goto __end; 2312 } 2313 if (frames > (snd_pcm_uframes_t)avail) 2314 frames = avail; 2315 appl_ptr = runtime->control->appl_ptr + frames; 2316 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2317 appl_ptr -= runtime->boundary; 2318 runtime->control->appl_ptr = appl_ptr; 2319 ret = frames; 2320 __end: 2321 snd_pcm_stream_unlock_irq(substream); 2322 return ret; 2323 } 2324 2325 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2326 snd_pcm_uframes_t frames) 2327 { 2328 struct snd_pcm_runtime *runtime = substream->runtime; 2329 snd_pcm_sframes_t appl_ptr; 2330 snd_pcm_sframes_t ret; 2331 snd_pcm_sframes_t avail; 2332 2333 if (frames == 0) 2334 return 0; 2335 2336 snd_pcm_stream_lock_irq(substream); 2337 switch (runtime->status->state) { 2338 case SNDRV_PCM_STATE_PREPARED: 2339 case SNDRV_PCM_STATE_DRAINING: 2340 case SNDRV_PCM_STATE_PAUSED: 2341 break; 2342 case SNDRV_PCM_STATE_RUNNING: 2343 if (snd_pcm_update_hw_ptr(substream) >= 0) 2344 break; 2345 /* Fall through */ 2346 case SNDRV_PCM_STATE_XRUN: 2347 ret = -EPIPE; 2348 goto __end; 2349 case SNDRV_PCM_STATE_SUSPENDED: 2350 ret = -ESTRPIPE; 2351 goto __end; 2352 default: 2353 ret = -EBADFD; 2354 goto __end; 2355 } 2356 2357 avail = snd_pcm_capture_avail(runtime); 2358 if (avail <= 0) { 2359 ret = 0; 2360 goto __end; 2361 } 2362 if (frames > (snd_pcm_uframes_t)avail) 2363 frames = avail; 2364 appl_ptr = runtime->control->appl_ptr + frames; 2365 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2366 appl_ptr -= runtime->boundary; 2367 runtime->control->appl_ptr = appl_ptr; 2368 ret = frames; 2369 __end: 2370 snd_pcm_stream_unlock_irq(substream); 2371 return ret; 2372 } 2373 2374 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2375 { 2376 struct snd_pcm_runtime *runtime = substream->runtime; 2377 int err; 2378 2379 snd_pcm_stream_lock_irq(substream); 2380 switch (runtime->status->state) { 2381 case SNDRV_PCM_STATE_DRAINING: 2382 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2383 goto __badfd; 2384 case SNDRV_PCM_STATE_RUNNING: 2385 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2386 break; 2387 /* Fall through */ 2388 case SNDRV_PCM_STATE_PREPARED: 2389 case SNDRV_PCM_STATE_SUSPENDED: 2390 err = 0; 2391 break; 2392 case SNDRV_PCM_STATE_XRUN: 2393 err = -EPIPE; 2394 break; 2395 default: 2396 __badfd: 2397 err = -EBADFD; 2398 break; 2399 } 2400 snd_pcm_stream_unlock_irq(substream); 2401 return err; 2402 } 2403 2404 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2405 snd_pcm_sframes_t __user *res) 2406 { 2407 struct snd_pcm_runtime *runtime = substream->runtime; 2408 int err; 2409 snd_pcm_sframes_t n = 0; 2410 2411 snd_pcm_stream_lock_irq(substream); 2412 switch (runtime->status->state) { 2413 case SNDRV_PCM_STATE_DRAINING: 2414 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2415 goto __badfd; 2416 case SNDRV_PCM_STATE_RUNNING: 2417 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2418 break; 2419 /* Fall through */ 2420 case SNDRV_PCM_STATE_PREPARED: 2421 case SNDRV_PCM_STATE_SUSPENDED: 2422 err = 0; 2423 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2424 n = snd_pcm_playback_hw_avail(runtime); 2425 else 2426 n = snd_pcm_capture_avail(runtime); 2427 n += runtime->delay; 2428 break; 2429 case SNDRV_PCM_STATE_XRUN: 2430 err = -EPIPE; 2431 break; 2432 default: 2433 __badfd: 2434 err = -EBADFD; 2435 break; 2436 } 2437 snd_pcm_stream_unlock_irq(substream); 2438 if (!err) 2439 if (put_user(n, res)) 2440 err = -EFAULT; 2441 return err; 2442 } 2443 2444 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2445 struct snd_pcm_sync_ptr __user *_sync_ptr) 2446 { 2447 struct snd_pcm_runtime *runtime = substream->runtime; 2448 struct snd_pcm_sync_ptr sync_ptr; 2449 volatile struct snd_pcm_mmap_status *status; 2450 volatile struct snd_pcm_mmap_control *control; 2451 int err; 2452 2453 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2454 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2455 return -EFAULT; 2456 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2457 return -EFAULT; 2458 status = runtime->status; 2459 control = runtime->control; 2460 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2461 err = snd_pcm_hwsync(substream); 2462 if (err < 0) 2463 return err; 2464 } 2465 snd_pcm_stream_lock_irq(substream); 2466 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2467 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2468 else 2469 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2470 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2471 control->avail_min = sync_ptr.c.control.avail_min; 2472 else 2473 sync_ptr.c.control.avail_min = control->avail_min; 2474 sync_ptr.s.status.state = status->state; 2475 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2476 sync_ptr.s.status.tstamp = status->tstamp; 2477 sync_ptr.s.status.suspended_state = status->suspended_state; 2478 snd_pcm_stream_unlock_irq(substream); 2479 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2480 return -EFAULT; 2481 return 0; 2482 } 2483 2484 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2485 { 2486 struct snd_pcm_runtime *runtime = substream->runtime; 2487 int arg; 2488 2489 if (get_user(arg, _arg)) 2490 return -EFAULT; 2491 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2492 return -EINVAL; 2493 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2494 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2495 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2496 return 0; 2497 } 2498 2499 static int snd_pcm_common_ioctl1(struct file *file, 2500 struct snd_pcm_substream *substream, 2501 unsigned int cmd, void __user *arg) 2502 { 2503 switch (cmd) { 2504 case SNDRV_PCM_IOCTL_PVERSION: 2505 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2506 case SNDRV_PCM_IOCTL_INFO: 2507 return snd_pcm_info_user(substream, arg); 2508 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2509 return 0; 2510 case SNDRV_PCM_IOCTL_TTSTAMP: 2511 return snd_pcm_tstamp(substream, arg); 2512 case SNDRV_PCM_IOCTL_HW_REFINE: 2513 return snd_pcm_hw_refine_user(substream, arg); 2514 case SNDRV_PCM_IOCTL_HW_PARAMS: 2515 return snd_pcm_hw_params_user(substream, arg); 2516 case SNDRV_PCM_IOCTL_HW_FREE: 2517 return snd_pcm_hw_free(substream); 2518 case SNDRV_PCM_IOCTL_SW_PARAMS: 2519 return snd_pcm_sw_params_user(substream, arg); 2520 case SNDRV_PCM_IOCTL_STATUS: 2521 return snd_pcm_status_user(substream, arg); 2522 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2523 return snd_pcm_channel_info_user(substream, arg); 2524 case SNDRV_PCM_IOCTL_PREPARE: 2525 return snd_pcm_prepare(substream, file); 2526 case SNDRV_PCM_IOCTL_RESET: 2527 return snd_pcm_reset(substream); 2528 case SNDRV_PCM_IOCTL_START: 2529 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2530 case SNDRV_PCM_IOCTL_LINK: 2531 return snd_pcm_link(substream, (int)(unsigned long) arg); 2532 case SNDRV_PCM_IOCTL_UNLINK: 2533 return snd_pcm_unlink(substream); 2534 case SNDRV_PCM_IOCTL_RESUME: 2535 return snd_pcm_resume(substream); 2536 case SNDRV_PCM_IOCTL_XRUN: 2537 return snd_pcm_xrun(substream); 2538 case SNDRV_PCM_IOCTL_HWSYNC: 2539 return snd_pcm_hwsync(substream); 2540 case SNDRV_PCM_IOCTL_DELAY: 2541 return snd_pcm_delay(substream, arg); 2542 case SNDRV_PCM_IOCTL_SYNC_PTR: 2543 return snd_pcm_sync_ptr(substream, arg); 2544 #ifdef CONFIG_SND_SUPPORT_OLD_API 2545 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2546 return snd_pcm_hw_refine_old_user(substream, arg); 2547 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2548 return snd_pcm_hw_params_old_user(substream, arg); 2549 #endif 2550 case SNDRV_PCM_IOCTL_DRAIN: 2551 return snd_pcm_drain(substream, file); 2552 case SNDRV_PCM_IOCTL_DROP: 2553 return snd_pcm_drop(substream); 2554 case SNDRV_PCM_IOCTL_PAUSE: 2555 { 2556 int res; 2557 snd_pcm_stream_lock_irq(substream); 2558 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2559 snd_pcm_stream_unlock_irq(substream); 2560 return res; 2561 } 2562 } 2563 snd_printd("unknown ioctl = 0x%x\n", cmd); 2564 return -ENOTTY; 2565 } 2566 2567 static int snd_pcm_playback_ioctl1(struct file *file, 2568 struct snd_pcm_substream *substream, 2569 unsigned int cmd, void __user *arg) 2570 { 2571 if (snd_BUG_ON(!substream)) 2572 return -ENXIO; 2573 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2574 return -EINVAL; 2575 switch (cmd) { 2576 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2577 { 2578 struct snd_xferi xferi; 2579 struct snd_xferi __user *_xferi = arg; 2580 struct snd_pcm_runtime *runtime = substream->runtime; 2581 snd_pcm_sframes_t result; 2582 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2583 return -EBADFD; 2584 if (put_user(0, &_xferi->result)) 2585 return -EFAULT; 2586 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2587 return -EFAULT; 2588 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2589 __put_user(result, &_xferi->result); 2590 return result < 0 ? result : 0; 2591 } 2592 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2593 { 2594 struct snd_xfern xfern; 2595 struct snd_xfern __user *_xfern = arg; 2596 struct snd_pcm_runtime *runtime = substream->runtime; 2597 void __user **bufs; 2598 snd_pcm_sframes_t result; 2599 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2600 return -EBADFD; 2601 if (runtime->channels > 128) 2602 return -EINVAL; 2603 if (put_user(0, &_xfern->result)) 2604 return -EFAULT; 2605 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2606 return -EFAULT; 2607 2608 bufs = memdup_user(xfern.bufs, 2609 sizeof(void *) * runtime->channels); 2610 if (IS_ERR(bufs)) 2611 return PTR_ERR(bufs); 2612 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2613 kfree(bufs); 2614 __put_user(result, &_xfern->result); 2615 return result < 0 ? result : 0; 2616 } 2617 case SNDRV_PCM_IOCTL_REWIND: 2618 { 2619 snd_pcm_uframes_t frames; 2620 snd_pcm_uframes_t __user *_frames = arg; 2621 snd_pcm_sframes_t result; 2622 if (get_user(frames, _frames)) 2623 return -EFAULT; 2624 if (put_user(0, _frames)) 2625 return -EFAULT; 2626 result = snd_pcm_playback_rewind(substream, frames); 2627 __put_user(result, _frames); 2628 return result < 0 ? result : 0; 2629 } 2630 case SNDRV_PCM_IOCTL_FORWARD: 2631 { 2632 snd_pcm_uframes_t frames; 2633 snd_pcm_uframes_t __user *_frames = arg; 2634 snd_pcm_sframes_t result; 2635 if (get_user(frames, _frames)) 2636 return -EFAULT; 2637 if (put_user(0, _frames)) 2638 return -EFAULT; 2639 result = snd_pcm_playback_forward(substream, frames); 2640 __put_user(result, _frames); 2641 return result < 0 ? result : 0; 2642 } 2643 } 2644 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2645 } 2646 2647 static int snd_pcm_capture_ioctl1(struct file *file, 2648 struct snd_pcm_substream *substream, 2649 unsigned int cmd, void __user *arg) 2650 { 2651 if (snd_BUG_ON(!substream)) 2652 return -ENXIO; 2653 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2654 return -EINVAL; 2655 switch (cmd) { 2656 case SNDRV_PCM_IOCTL_READI_FRAMES: 2657 { 2658 struct snd_xferi xferi; 2659 struct snd_xferi __user *_xferi = arg; 2660 struct snd_pcm_runtime *runtime = substream->runtime; 2661 snd_pcm_sframes_t result; 2662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2663 return -EBADFD; 2664 if (put_user(0, &_xferi->result)) 2665 return -EFAULT; 2666 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2667 return -EFAULT; 2668 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2669 __put_user(result, &_xferi->result); 2670 return result < 0 ? result : 0; 2671 } 2672 case SNDRV_PCM_IOCTL_READN_FRAMES: 2673 { 2674 struct snd_xfern xfern; 2675 struct snd_xfern __user *_xfern = arg; 2676 struct snd_pcm_runtime *runtime = substream->runtime; 2677 void *bufs; 2678 snd_pcm_sframes_t result; 2679 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2680 return -EBADFD; 2681 if (runtime->channels > 128) 2682 return -EINVAL; 2683 if (put_user(0, &_xfern->result)) 2684 return -EFAULT; 2685 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2686 return -EFAULT; 2687 2688 bufs = memdup_user(xfern.bufs, 2689 sizeof(void *) * runtime->channels); 2690 if (IS_ERR(bufs)) 2691 return PTR_ERR(bufs); 2692 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2693 kfree(bufs); 2694 __put_user(result, &_xfern->result); 2695 return result < 0 ? result : 0; 2696 } 2697 case SNDRV_PCM_IOCTL_REWIND: 2698 { 2699 snd_pcm_uframes_t frames; 2700 snd_pcm_uframes_t __user *_frames = arg; 2701 snd_pcm_sframes_t result; 2702 if (get_user(frames, _frames)) 2703 return -EFAULT; 2704 if (put_user(0, _frames)) 2705 return -EFAULT; 2706 result = snd_pcm_capture_rewind(substream, frames); 2707 __put_user(result, _frames); 2708 return result < 0 ? result : 0; 2709 } 2710 case SNDRV_PCM_IOCTL_FORWARD: 2711 { 2712 snd_pcm_uframes_t frames; 2713 snd_pcm_uframes_t __user *_frames = arg; 2714 snd_pcm_sframes_t result; 2715 if (get_user(frames, _frames)) 2716 return -EFAULT; 2717 if (put_user(0, _frames)) 2718 return -EFAULT; 2719 result = snd_pcm_capture_forward(substream, frames); 2720 __put_user(result, _frames); 2721 return result < 0 ? result : 0; 2722 } 2723 } 2724 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2725 } 2726 2727 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2728 unsigned long arg) 2729 { 2730 struct snd_pcm_file *pcm_file; 2731 2732 pcm_file = file->private_data; 2733 2734 if (((cmd >> 8) & 0xff) != 'A') 2735 return -ENOTTY; 2736 2737 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2738 (void __user *)arg); 2739 } 2740 2741 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2742 unsigned long arg) 2743 { 2744 struct snd_pcm_file *pcm_file; 2745 2746 pcm_file = file->private_data; 2747 2748 if (((cmd >> 8) & 0xff) != 'A') 2749 return -ENOTTY; 2750 2751 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2752 (void __user *)arg); 2753 } 2754 2755 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2756 unsigned int cmd, void *arg) 2757 { 2758 mm_segment_t fs; 2759 int result; 2760 2761 fs = snd_enter_user(); 2762 switch (substream->stream) { 2763 case SNDRV_PCM_STREAM_PLAYBACK: 2764 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2765 (void __user *)arg); 2766 break; 2767 case SNDRV_PCM_STREAM_CAPTURE: 2768 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2769 (void __user *)arg); 2770 break; 2771 default: 2772 result = -EINVAL; 2773 break; 2774 } 2775 snd_leave_user(fs); 2776 return result; 2777 } 2778 2779 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2780 2781 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2782 loff_t * offset) 2783 { 2784 struct snd_pcm_file *pcm_file; 2785 struct snd_pcm_substream *substream; 2786 struct snd_pcm_runtime *runtime; 2787 snd_pcm_sframes_t result; 2788 2789 pcm_file = file->private_data; 2790 substream = pcm_file->substream; 2791 if (PCM_RUNTIME_CHECK(substream)) 2792 return -ENXIO; 2793 runtime = substream->runtime; 2794 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2795 return -EBADFD; 2796 if (!frame_aligned(runtime, count)) 2797 return -EINVAL; 2798 count = bytes_to_frames(runtime, count); 2799 result = snd_pcm_lib_read(substream, buf, count); 2800 if (result > 0) 2801 result = frames_to_bytes(runtime, result); 2802 return result; 2803 } 2804 2805 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2806 size_t count, loff_t * offset) 2807 { 2808 struct snd_pcm_file *pcm_file; 2809 struct snd_pcm_substream *substream; 2810 struct snd_pcm_runtime *runtime; 2811 snd_pcm_sframes_t result; 2812 2813 pcm_file = file->private_data; 2814 substream = pcm_file->substream; 2815 if (PCM_RUNTIME_CHECK(substream)) 2816 return -ENXIO; 2817 runtime = substream->runtime; 2818 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2819 return -EBADFD; 2820 if (!frame_aligned(runtime, count)) 2821 return -EINVAL; 2822 count = bytes_to_frames(runtime, count); 2823 result = snd_pcm_lib_write(substream, buf, count); 2824 if (result > 0) 2825 result = frames_to_bytes(runtime, result); 2826 return result; 2827 } 2828 2829 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2830 unsigned long nr_segs, loff_t pos) 2831 2832 { 2833 struct snd_pcm_file *pcm_file; 2834 struct snd_pcm_substream *substream; 2835 struct snd_pcm_runtime *runtime; 2836 snd_pcm_sframes_t result; 2837 unsigned long i; 2838 void __user **bufs; 2839 snd_pcm_uframes_t frames; 2840 2841 pcm_file = iocb->ki_filp->private_data; 2842 substream = pcm_file->substream; 2843 if (PCM_RUNTIME_CHECK(substream)) 2844 return -ENXIO; 2845 runtime = substream->runtime; 2846 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2847 return -EBADFD; 2848 if (nr_segs > 1024 || nr_segs != runtime->channels) 2849 return -EINVAL; 2850 if (!frame_aligned(runtime, iov->iov_len)) 2851 return -EINVAL; 2852 frames = bytes_to_samples(runtime, iov->iov_len); 2853 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2854 if (bufs == NULL) 2855 return -ENOMEM; 2856 for (i = 0; i < nr_segs; ++i) 2857 bufs[i] = iov[i].iov_base; 2858 result = snd_pcm_lib_readv(substream, bufs, frames); 2859 if (result > 0) 2860 result = frames_to_bytes(runtime, result); 2861 kfree(bufs); 2862 return result; 2863 } 2864 2865 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2866 unsigned long nr_segs, loff_t pos) 2867 { 2868 struct snd_pcm_file *pcm_file; 2869 struct snd_pcm_substream *substream; 2870 struct snd_pcm_runtime *runtime; 2871 snd_pcm_sframes_t result; 2872 unsigned long i; 2873 void __user **bufs; 2874 snd_pcm_uframes_t frames; 2875 2876 pcm_file = iocb->ki_filp->private_data; 2877 substream = pcm_file->substream; 2878 if (PCM_RUNTIME_CHECK(substream)) 2879 return -ENXIO; 2880 runtime = substream->runtime; 2881 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2882 return -EBADFD; 2883 if (nr_segs > 128 || nr_segs != runtime->channels || 2884 !frame_aligned(runtime, iov->iov_len)) 2885 return -EINVAL; 2886 frames = bytes_to_samples(runtime, iov->iov_len); 2887 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2888 if (bufs == NULL) 2889 return -ENOMEM; 2890 for (i = 0; i < nr_segs; ++i) 2891 bufs[i] = iov[i].iov_base; 2892 result = snd_pcm_lib_writev(substream, bufs, frames); 2893 if (result > 0) 2894 result = frames_to_bytes(runtime, result); 2895 kfree(bufs); 2896 return result; 2897 } 2898 2899 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2900 { 2901 struct snd_pcm_file *pcm_file; 2902 struct snd_pcm_substream *substream; 2903 struct snd_pcm_runtime *runtime; 2904 unsigned int mask; 2905 snd_pcm_uframes_t avail; 2906 2907 pcm_file = file->private_data; 2908 2909 substream = pcm_file->substream; 2910 if (PCM_RUNTIME_CHECK(substream)) 2911 return -ENXIO; 2912 runtime = substream->runtime; 2913 2914 poll_wait(file, &runtime->sleep, wait); 2915 2916 snd_pcm_stream_lock_irq(substream); 2917 avail = snd_pcm_playback_avail(runtime); 2918 switch (runtime->status->state) { 2919 case SNDRV_PCM_STATE_RUNNING: 2920 case SNDRV_PCM_STATE_PREPARED: 2921 case SNDRV_PCM_STATE_PAUSED: 2922 if (avail >= runtime->control->avail_min) { 2923 mask = POLLOUT | POLLWRNORM; 2924 break; 2925 } 2926 /* Fall through */ 2927 case SNDRV_PCM_STATE_DRAINING: 2928 mask = 0; 2929 break; 2930 default: 2931 mask = POLLOUT | POLLWRNORM | POLLERR; 2932 break; 2933 } 2934 snd_pcm_stream_unlock_irq(substream); 2935 return mask; 2936 } 2937 2938 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2939 { 2940 struct snd_pcm_file *pcm_file; 2941 struct snd_pcm_substream *substream; 2942 struct snd_pcm_runtime *runtime; 2943 unsigned int mask; 2944 snd_pcm_uframes_t avail; 2945 2946 pcm_file = file->private_data; 2947 2948 substream = pcm_file->substream; 2949 if (PCM_RUNTIME_CHECK(substream)) 2950 return -ENXIO; 2951 runtime = substream->runtime; 2952 2953 poll_wait(file, &runtime->sleep, wait); 2954 2955 snd_pcm_stream_lock_irq(substream); 2956 avail = snd_pcm_capture_avail(runtime); 2957 switch (runtime->status->state) { 2958 case SNDRV_PCM_STATE_RUNNING: 2959 case SNDRV_PCM_STATE_PREPARED: 2960 case SNDRV_PCM_STATE_PAUSED: 2961 if (avail >= runtime->control->avail_min) { 2962 mask = POLLIN | POLLRDNORM; 2963 break; 2964 } 2965 mask = 0; 2966 break; 2967 case SNDRV_PCM_STATE_DRAINING: 2968 if (avail > 0) { 2969 mask = POLLIN | POLLRDNORM; 2970 break; 2971 } 2972 /* Fall through */ 2973 default: 2974 mask = POLLIN | POLLRDNORM | POLLERR; 2975 break; 2976 } 2977 snd_pcm_stream_unlock_irq(substream); 2978 return mask; 2979 } 2980 2981 /* 2982 * mmap support 2983 */ 2984 2985 /* 2986 * Only on coherent architectures, we can mmap the status and the control records 2987 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2988 */ 2989 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2990 /* 2991 * mmap status record 2992 */ 2993 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2994 struct vm_fault *vmf) 2995 { 2996 struct snd_pcm_substream *substream = area->vm_private_data; 2997 struct snd_pcm_runtime *runtime; 2998 2999 if (substream == NULL) 3000 return VM_FAULT_SIGBUS; 3001 runtime = substream->runtime; 3002 vmf->page = virt_to_page(runtime->status); 3003 get_page(vmf->page); 3004 return 0; 3005 } 3006 3007 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3008 { 3009 .fault = snd_pcm_mmap_status_fault, 3010 }; 3011 3012 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3013 struct vm_area_struct *area) 3014 { 3015 struct snd_pcm_runtime *runtime; 3016 long size; 3017 if (!(area->vm_flags & VM_READ)) 3018 return -EINVAL; 3019 runtime = substream->runtime; 3020 size = area->vm_end - area->vm_start; 3021 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3022 return -EINVAL; 3023 area->vm_ops = &snd_pcm_vm_ops_status; 3024 area->vm_private_data = substream; 3025 area->vm_flags |= VM_RESERVED; 3026 return 0; 3027 } 3028 3029 /* 3030 * mmap control record 3031 */ 3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3033 struct vm_fault *vmf) 3034 { 3035 struct snd_pcm_substream *substream = area->vm_private_data; 3036 struct snd_pcm_runtime *runtime; 3037 3038 if (substream == NULL) 3039 return VM_FAULT_SIGBUS; 3040 runtime = substream->runtime; 3041 vmf->page = virt_to_page(runtime->control); 3042 get_page(vmf->page); 3043 return 0; 3044 } 3045 3046 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3047 { 3048 .fault = snd_pcm_mmap_control_fault, 3049 }; 3050 3051 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3052 struct vm_area_struct *area) 3053 { 3054 struct snd_pcm_runtime *runtime; 3055 long size; 3056 if (!(area->vm_flags & VM_READ)) 3057 return -EINVAL; 3058 runtime = substream->runtime; 3059 size = area->vm_end - area->vm_start; 3060 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3061 return -EINVAL; 3062 area->vm_ops = &snd_pcm_vm_ops_control; 3063 area->vm_private_data = substream; 3064 area->vm_flags |= VM_RESERVED; 3065 return 0; 3066 } 3067 #else /* ! coherent mmap */ 3068 /* 3069 * don't support mmap for status and control records. 3070 */ 3071 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3072 struct vm_area_struct *area) 3073 { 3074 return -ENXIO; 3075 } 3076 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3077 struct vm_area_struct *area) 3078 { 3079 return -ENXIO; 3080 } 3081 #endif /* coherent mmap */ 3082 3083 static inline struct page * 3084 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3085 { 3086 void *vaddr = substream->runtime->dma_area + ofs; 3087 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3088 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3089 return virt_to_page(CAC_ADDR(vaddr)); 3090 #endif 3091 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3092 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3093 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3094 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3095 /* assume dma_handle set via pfn_to_phys() in 3096 * mm/dma-noncoherent.c 3097 */ 3098 return pfn_to_page(addr >> PAGE_SHIFT); 3099 } 3100 #endif 3101 return virt_to_page(vaddr); 3102 } 3103 3104 /* 3105 * fault callback for mmapping a RAM page 3106 */ 3107 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3108 struct vm_fault *vmf) 3109 { 3110 struct snd_pcm_substream *substream = area->vm_private_data; 3111 struct snd_pcm_runtime *runtime; 3112 unsigned long offset; 3113 struct page * page; 3114 size_t dma_bytes; 3115 3116 if (substream == NULL) 3117 return VM_FAULT_SIGBUS; 3118 runtime = substream->runtime; 3119 offset = vmf->pgoff << PAGE_SHIFT; 3120 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3121 if (offset > dma_bytes - PAGE_SIZE) 3122 return VM_FAULT_SIGBUS; 3123 if (substream->ops->page) 3124 page = substream->ops->page(substream, offset); 3125 else 3126 page = snd_pcm_default_page_ops(substream, offset); 3127 if (!page) 3128 return VM_FAULT_SIGBUS; 3129 get_page(page); 3130 vmf->page = page; 3131 return 0; 3132 } 3133 3134 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3135 .open = snd_pcm_mmap_data_open, 3136 .close = snd_pcm_mmap_data_close, 3137 }; 3138 3139 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3140 .open = snd_pcm_mmap_data_open, 3141 .close = snd_pcm_mmap_data_close, 3142 .fault = snd_pcm_mmap_data_fault, 3143 }; 3144 3145 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3146 /* This should be defined / handled globally! */ 3147 #ifdef CONFIG_ARM 3148 #define ARCH_HAS_DMA_MMAP_COHERENT 3149 #endif 3150 #endif 3151 3152 /* 3153 * mmap the DMA buffer on RAM 3154 */ 3155 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3156 struct vm_area_struct *area) 3157 { 3158 area->vm_flags |= VM_RESERVED; 3159 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3160 if (!substream->ops->page && 3161 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3162 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3163 area, 3164 substream->runtime->dma_area, 3165 substream->runtime->dma_addr, 3166 area->vm_end - area->vm_start); 3167 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3168 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3169 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3170 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3171 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3172 /* mmap with fault handler */ 3173 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3174 return 0; 3175 } 3176 3177 /* 3178 * mmap the DMA buffer on I/O memory area 3179 */ 3180 #if SNDRV_PCM_INFO_MMAP_IOMEM 3181 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3182 struct vm_area_struct *area) 3183 { 3184 long size; 3185 unsigned long offset; 3186 3187 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3188 area->vm_flags |= VM_IO; 3189 size = area->vm_end - area->vm_start; 3190 offset = area->vm_pgoff << PAGE_SHIFT; 3191 if (io_remap_pfn_range(area, area->vm_start, 3192 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3193 size, area->vm_page_prot)) 3194 return -EAGAIN; 3195 return 0; 3196 } 3197 3198 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3199 #endif /* SNDRV_PCM_INFO_MMAP */ 3200 3201 /* mmap callback with pgprot_noncached */ 3202 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3203 struct vm_area_struct *area) 3204 { 3205 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3206 return snd_pcm_default_mmap(substream, area); 3207 } 3208 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3209 3210 /* 3211 * mmap DMA buffer 3212 */ 3213 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3214 struct vm_area_struct *area) 3215 { 3216 struct snd_pcm_runtime *runtime; 3217 long size; 3218 unsigned long offset; 3219 size_t dma_bytes; 3220 int err; 3221 3222 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3223 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3224 return -EINVAL; 3225 } else { 3226 if (!(area->vm_flags & VM_READ)) 3227 return -EINVAL; 3228 } 3229 runtime = substream->runtime; 3230 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3231 return -EBADFD; 3232 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3233 return -ENXIO; 3234 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3235 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3236 return -EINVAL; 3237 size = area->vm_end - area->vm_start; 3238 offset = area->vm_pgoff << PAGE_SHIFT; 3239 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3240 if ((size_t)size > dma_bytes) 3241 return -EINVAL; 3242 if (offset > dma_bytes - size) 3243 return -EINVAL; 3244 3245 area->vm_ops = &snd_pcm_vm_ops_data; 3246 area->vm_private_data = substream; 3247 if (substream->ops->mmap) 3248 err = substream->ops->mmap(substream, area); 3249 else 3250 err = snd_pcm_default_mmap(substream, area); 3251 if (!err) 3252 atomic_inc(&substream->mmap_count); 3253 return err; 3254 } 3255 3256 EXPORT_SYMBOL(snd_pcm_mmap_data); 3257 3258 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3259 { 3260 struct snd_pcm_file * pcm_file; 3261 struct snd_pcm_substream *substream; 3262 unsigned long offset; 3263 3264 pcm_file = file->private_data; 3265 substream = pcm_file->substream; 3266 if (PCM_RUNTIME_CHECK(substream)) 3267 return -ENXIO; 3268 3269 offset = area->vm_pgoff << PAGE_SHIFT; 3270 switch (offset) { 3271 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3272 if (pcm_file->no_compat_mmap) 3273 return -ENXIO; 3274 return snd_pcm_mmap_status(substream, file, area); 3275 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3276 if (pcm_file->no_compat_mmap) 3277 return -ENXIO; 3278 return snd_pcm_mmap_control(substream, file, area); 3279 default: 3280 return snd_pcm_mmap_data(substream, file, area); 3281 } 3282 return 0; 3283 } 3284 3285 static int snd_pcm_fasync(int fd, struct file * file, int on) 3286 { 3287 struct snd_pcm_file * pcm_file; 3288 struct snd_pcm_substream *substream; 3289 struct snd_pcm_runtime *runtime; 3290 3291 pcm_file = file->private_data; 3292 substream = pcm_file->substream; 3293 if (PCM_RUNTIME_CHECK(substream)) 3294 return -ENXIO; 3295 runtime = substream->runtime; 3296 return fasync_helper(fd, file, on, &runtime->fasync); 3297 } 3298 3299 /* 3300 * ioctl32 compat 3301 */ 3302 #ifdef CONFIG_COMPAT 3303 #include "pcm_compat.c" 3304 #else 3305 #define snd_pcm_ioctl_compat NULL 3306 #endif 3307 3308 /* 3309 * To be removed helpers to keep binary compatibility 3310 */ 3311 3312 #ifdef CONFIG_SND_SUPPORT_OLD_API 3313 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3314 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3315 3316 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3317 struct snd_pcm_hw_params_old *oparams) 3318 { 3319 unsigned int i; 3320 3321 memset(params, 0, sizeof(*params)); 3322 params->flags = oparams->flags; 3323 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3324 params->masks[i].bits[0] = oparams->masks[i]; 3325 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3326 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3327 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3328 params->info = oparams->info; 3329 params->msbits = oparams->msbits; 3330 params->rate_num = oparams->rate_num; 3331 params->rate_den = oparams->rate_den; 3332 params->fifo_size = oparams->fifo_size; 3333 } 3334 3335 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3336 struct snd_pcm_hw_params *params) 3337 { 3338 unsigned int i; 3339 3340 memset(oparams, 0, sizeof(*oparams)); 3341 oparams->flags = params->flags; 3342 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3343 oparams->masks[i] = params->masks[i].bits[0]; 3344 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3345 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3346 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3347 oparams->info = params->info; 3348 oparams->msbits = params->msbits; 3349 oparams->rate_num = params->rate_num; 3350 oparams->rate_den = params->rate_den; 3351 oparams->fifo_size = params->fifo_size; 3352 } 3353 3354 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3355 struct snd_pcm_hw_params_old __user * _oparams) 3356 { 3357 struct snd_pcm_hw_params *params; 3358 struct snd_pcm_hw_params_old *oparams = NULL; 3359 int err; 3360 3361 params = kmalloc(sizeof(*params), GFP_KERNEL); 3362 if (!params) 3363 return -ENOMEM; 3364 3365 oparams = memdup_user(_oparams, sizeof(*oparams)); 3366 if (IS_ERR(oparams)) { 3367 err = PTR_ERR(oparams); 3368 goto out; 3369 } 3370 snd_pcm_hw_convert_from_old_params(params, oparams); 3371 err = snd_pcm_hw_refine(substream, params); 3372 snd_pcm_hw_convert_to_old_params(oparams, params); 3373 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3374 if (!err) 3375 err = -EFAULT; 3376 } 3377 3378 kfree(oparams); 3379 out: 3380 kfree(params); 3381 return err; 3382 } 3383 3384 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3385 struct snd_pcm_hw_params_old __user * _oparams) 3386 { 3387 struct snd_pcm_hw_params *params; 3388 struct snd_pcm_hw_params_old *oparams = NULL; 3389 int err; 3390 3391 params = kmalloc(sizeof(*params), GFP_KERNEL); 3392 if (!params) 3393 return -ENOMEM; 3394 3395 oparams = memdup_user(_oparams, sizeof(*oparams)); 3396 if (IS_ERR(oparams)) { 3397 err = PTR_ERR(oparams); 3398 goto out; 3399 } 3400 snd_pcm_hw_convert_from_old_params(params, oparams); 3401 err = snd_pcm_hw_params(substream, params); 3402 snd_pcm_hw_convert_to_old_params(oparams, params); 3403 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3404 if (!err) 3405 err = -EFAULT; 3406 } 3407 3408 kfree(oparams); 3409 out: 3410 kfree(params); 3411 return err; 3412 } 3413 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3414 3415 #ifndef CONFIG_MMU 3416 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3417 unsigned long addr, 3418 unsigned long len, 3419 unsigned long pgoff, 3420 unsigned long flags) 3421 { 3422 struct snd_pcm_file *pcm_file = file->private_data; 3423 struct snd_pcm_substream *substream = pcm_file->substream; 3424 struct snd_pcm_runtime *runtime = substream->runtime; 3425 unsigned long offset = pgoff << PAGE_SHIFT; 3426 3427 switch (offset) { 3428 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3429 return (unsigned long)runtime->status; 3430 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3431 return (unsigned long)runtime->control; 3432 default: 3433 return (unsigned long)runtime->dma_area + offset; 3434 } 3435 } 3436 #else 3437 # define snd_pcm_get_unmapped_area NULL 3438 #endif 3439 3440 /* 3441 * Register section 3442 */ 3443 3444 const struct file_operations snd_pcm_f_ops[2] = { 3445 { 3446 .owner = THIS_MODULE, 3447 .write = snd_pcm_write, 3448 .aio_write = snd_pcm_aio_write, 3449 .open = snd_pcm_playback_open, 3450 .release = snd_pcm_release, 3451 .llseek = no_llseek, 3452 .poll = snd_pcm_playback_poll, 3453 .unlocked_ioctl = snd_pcm_playback_ioctl, 3454 .compat_ioctl = snd_pcm_ioctl_compat, 3455 .mmap = snd_pcm_mmap, 3456 .fasync = snd_pcm_fasync, 3457 .get_unmapped_area = snd_pcm_get_unmapped_area, 3458 }, 3459 { 3460 .owner = THIS_MODULE, 3461 .read = snd_pcm_read, 3462 .aio_read = snd_pcm_aio_read, 3463 .open = snd_pcm_capture_open, 3464 .release = snd_pcm_release, 3465 .llseek = no_llseek, 3466 .poll = snd_pcm_capture_poll, 3467 .unlocked_ioctl = snd_pcm_capture_ioctl, 3468 .compat_ioctl = snd_pcm_ioctl_compat, 3469 .mmap = snd_pcm_mmap, 3470 .fasync = snd_pcm_fasync, 3471 .get_unmapped_area = snd_pcm_get_unmapped_area, 3472 } 3473 }; 3474